Clofarabine Impurity 4 CAS 70832-64-3
| CAS No. | 70832-64-3 |
| Molecular Formula | C28H24O9 |
| Molecular Weight | 504.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Clofarabine Impurity 4 (C28H24O9) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Clofarabine Impurity 4 (CAS 70832-64-3) is a high-purity analytical reference standard with the molecular formula C28H24O9 and a molecular weight of 504.48 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C28H24O9 |
| Molecular Weight | 504.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
Related Clofarabine Standards
- Clofarabine Impurity 5 (CAS 14215-97-5)
- Clofarabine Impurity N2 (CAS 704916-12-1)
- Clofarabine Impurity 6 (CAS 97614-43-2)
- Clofarabine Impurity 10 (CAS CATO-C4X-159310)
- Clofarabine Impurity 9 (CAS CATO-C4X-15939)
- Clofarabine Impurity 16 (CAS CATO-C4X-159316)
- Clofarabine Impurity 8 (CAS 111615-20-4)
- Clofarabine (CAS 123318-82-1)
Recommended Standards
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- n-(3-Fluorophenyl)-1,3-thiazolidine-4-carboxamide (CAS 1105686-29-0)
- Insulin Degludec Impurity 16 (CAS CATO-C4X-215716)
Why CATO?
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